you can buy them here, $35 for necklaces, my earrings are also in that listing for $40 a pair.

These are made with real mushrooms, trametes versicolor, or turkey tail, thas have been plated with copper.
Turkey tails are a sapotrophic mushroom, meaning it grows on dead wood. They’re also polypores, which means they release spores from small holes, or maze like structures instead of gills.
Some people consider them medicinal.